My 4sp swap thread

I'm currently collecting parts/knowledge to swap my '72 duster over to a 4 spd. I'm sure I'm going to have many questions and figured if I used one thread for all of them I might document my process and it may help someone else in the future.

So my plan.

833
Centerforce clutch
Hydraulic linkage with slave and fork

So far I have a lakewood bellhousing for a small block and pedals.

Two questions to start with:

1) Does anyone have experience with putting a '75-'76 Tunnel into a '67-'74 a body? I'd like to relieve StrokerScamp of the ones hes got in the classifieds if it will work..

2) I dont have the tranny yet and was hoping to get some feed back on which 833 would be the best for my application.
My car has a Mopar 360 390 hp crate motor it has a 9:1 compression and the cam specs are 288°/292° Advertised Duration 230°/234° Duration @ .050" 0.501"/0.513" Lift. Its a street car that I dont plan to ever race, and would like to be able to drive on the highway a bit, which with the 3.91 rear it has had me looking at the 833 OD unit, but I'm concerned about the big jump between first and second gear and the cam in my motor, will the RPM drop be to much?
Should I go with the non OD unit and if so, which gear set should I look for?

thanks, and please feel free to jump in with any advice that you might have that might apply to my situation.

Heres a picture of my car when I bought it in Florida to get an idea of what i'm working on.